Nut and bolt lock.



4ff-ElvUtL ANnfBoLTLooK. 5.-'-

speeincatien of Letters Patent. l

Appiicatin mea February 2o, 1917. serial NQ. 149,946.'

This invention relates to improvements in locking devices, and particularly to locks for use on nuts and bolts. j One object of the presentinvention is to provide a novel and simple device for preventing the rotation of the nut in either direction.

Another object is to provide a device of this character which is formed from a simple on the bolt Vpiece of metal.

Another object is to provide a device of this character which includes novel means of structure wherein the bolt and nut are effectively locked together and the nut prevented from turning on the bolt.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing: v

Figure 1 is an elevation of a nut and boltv on which my invention is applied v'and in operative or locked position.

Fig. 2 is a top plan view of the device.v

Fig. 3 is a sectional view line 3-3 of Fig. 1.

Fig. 4 is a plan view of the blank from which the locking device is formed.

' Referring particularly to the accompanying drawing 10 represents a bolt which is provided with the usual threaded portion 11. Formed in the threaded portion, and on l opposite sides therof, are the flattened faces 12, which result from the formation of the grooves which are made transversely of the bolt,.as shown at 13. The locking device is adapted to coperate with these grooves, as clearly shown in the drawing, and as will be now more clearly set forth.

The locking device is preferably formedl from a single blank of metal which has a taken yon the'y with ease and success.

square body portion 14, on two of the opposite sides of which there are formed with wings 15. 0n one of the remaining sides there is formed a similar wing'16. vThe blank'is cut onthe lines 17 and 18 so as to provide a tab 19 of the wing 16 to-eXtend Patented oet. 9, 1917.

transversely of the adjacent end of one of the wings 15,V whilel a tab 20 is, formed at ".60 one end of the other wing 15, which extends l transversely of the adjacent end of the wing".`

l16. The other end of each of the wings 15 extends beyond the unwinged side ofther body in the form of a tab 21 its dimensionsv being equal to that of the tabs ofthe wings 15 and 16. Formed in the body, in parallel relation to the winged sides 15, is an openended slot 22 which isarranged to straddle the threaded portion of the bolt and have itsl side walls enter the sides ofl said bolt. v 1

When the locking device is thus engaged grooves formed'y in the in the grooves of the bolt, the wings 15 and f 16 are bent downwardly against the corresponding three side faces of the nut. The

tabs 19 and 20 are then bent against the outer faces of the adjacent ends'of the wings 16 and 15, respectively. ,'The tabs V21 are' then bent so as to extend toward each other and lie against the remaining sideV face of the nut. Thus the nut and bolt are firmly held against relative rotation nut cannot back oli".

vParticular attention is called to the fact that the locking device is formed of a` single piecerof metal, whereby the device cany be' cheaply manufactured and can be operated What is claimed'is:' Y l v1.l A nut andbolt lock including a bolt having the threaded portion oppositely grooved, anda locking member including a slotted body for engagement'in the grooves of the bolt, wings Vonopposite sides of the body for engagement with opposite side faces of the nut of the bolt, andl a tab on each of said wings for engagement with the adjacent end of a wing.

2. A nut and bolt lock formed from a so that the v single metal blank and including a bodv havingacentrally formed open-ended slot, wings on two of the opposite sides of the body, tabs formed on opposite ends'of one v Intestmony whereof, I affix my signa-v ture 1n the presence of two Witnesses. y

Y HENRY N. eneeronn.

/Vt'nessesz Y ARTHUR C. REED, MABEL Hoop.,V

of said Wings, and a Wing on one of the remaining sides of the body and formed with a tab at one end thereof, one of the firstnzuned Wings having a tab at one,end,the1ast named tab and one of the tabs of the firstnamed Wings being extended beyond the ad- Y jacent side of the body. l

@opies of this patent may be obtained for'ive vcents eaeln'by addressing the Commissioner of Patents,

` Washington, D. C. 

